1996 Mercury Marquis Repair Question
1996 grand marquis
How long since a tune-up? any applicable codes? When the problem occurs, did you visually check for spark at the plugs? Also, use a gage and check fuel pressure. You have to test when the problem is ongoing.
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Are you using a block heater on the engine? If so try checking the fuel pressure if its within specs if so test the coolant temperature sensor-start here
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